Real-time automatic polarization control based on golden section search and proportional endless reset-free control
Applied Optics
|August 12, 2025
Summary
This study introduces a new automatic polarization control for fiber optics using golden section search (GSS) and proportional endless reset-free (PE-RF) algorithms. The method ensures stable signal transmission by maximizing light power in optical fiber links.
Area of Science:
- Photonics and Optical Communications
- Control Systems Engineering
- Microcontroller Applications
Background:
- Polarization fluctuations in fiber-optic systems degrade signal quality.
- Real-time, automatic polarization control is crucial for reliable optical communication.
Purpose of the Study:
- To propose and demonstrate a novel, cost-effective, real-time automatic polarization control scheme.
- To mitigate polarization-induced signal degradation in optical fiber links.
Main Methods:
- Utilizing golden section search (GSS) and proportional endless reset-free (PE-RF) algorithms for control.
- Employing an Arduino Uno R3 microcontroller to drive an electronic polarization controller.
- Implementing a feedback mechanism based on maximizing orthogonal polarization components.
Main Results:
- Demonstrated stable polarization control for binary and 4-PAM optical links over 50 km fiber.
- Maintained a Q-factor within ±0.5 dBm with excellent eye opening.
- Achieved stable operation for over 100 minutes of continuous use.
Conclusions:
- The proposed GSS and PE-RF based polarization control is simple, cost-effective, and fast.
- This method effectively mitigates polarization fluctuations in optical fiber systems.
- The scheme ensures reliable performance for high-speed optical data transmission.
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